Where is knock sensor on 350 TBI?

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Big6ft6, Oct 22, 2008.

  1. Big6ft6

    Big6ft6 Rockstar 100 Posts

    Where is the knock sensor location on a 1989 350 TBI? :neutral:

    I put in a new engine and can't remember where the knock sensor goes, I know it was on the passenger side, but the hole in the passenger side head is too big for the knock sensor threads???

    Is there a different hole further down on the block?
  2. dwill3015

    dwill3015 Epic Member 5+ Years ROTM Winner 1000 Posts

    Follow the instructions in this thread and it should show you where to find it.
  3. zippy

    zippy Rockstar 100 Posts

    Yep, it's in the block, just above the pan and forward of the starter.
  4. Big6ft6

    Big6ft6 Rockstar 100 Posts

    Wow...all I can say is "holy mother load of awesome informatin!" great reference Thanks!
  5. Big6ft6

    Big6ft6 Rockstar 100 Posts

    Thanks Zippy,

    Maybe the engine rebulider put a plug in there? Or I just couldn't see it from in front of the truck, I'll look closer tonight!
  6. zippy

    zippy Rockstar 100 Posts

    I put in a new crate motor last spring, and the anti knock sensor hole was plugged. I don't recall if the plug had a proud square head, or a hex recess. I do recall that one of the factory plugs was a hex that was bigger than any allen key I have. My solution was to put a short bolt's head in the hole and then use a deep socket to spin the bolt and the plug.

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